HD2156 -gb

Portable pH and Conductivity meter Mod.HD2156
Mod.HD2156 is a portable instrument for the measure of pH, ORP, conductivity, resistivity, TDS and temperature.  It can be connected to pH or ORP electrodes and to 2 or 4 electrodes conductivity cells including integral temperature sensor.
The pH calibration can be operated both manually or automatically and the buffer value can be selected within 13 memorized pH buffer values.
The instrument can be calibrated with standard conductivity solutions,  147 uS/cm, 1413 uS/cm 12880 uS/cm and 111800 uS/cm.
The instrument  is characterized by advanced functionalities as  automatic measure thermocompensation, hold function, relative indication,  maximum, minumum and average value computation.  The automatic power off  can be disabled.
The instrument can cover with high accuracy  wide measuring ranges.
Conductivity measure thermocompensation is automatic, and temperature coefficient can be configured with any value inside the limits 0.00 to 4.00%/°C.  Reference temperature can be set at 20 °C or 25°C.
The instrument can be connected to conductivity cells with 10 cm, 1.43 cm, 1.0 cm, 0.1 cm cell constant.
The ratio c/TDS can be freely set inside the range limits 0.4 - 0.8.
A large area (52 x 42 mm) 2x4½ digit LCD display allows pH , mV, conductivity  (or resistivity or TDS) and temperature visualization.
The instrument includes a galvanically isolated RS232C serial interface.
Power supply is from 4 batteries, 1,5 V, AA type, with 200 h average operation (alkaline batteries, 1800 mAh).  The instrument includes a power adapter  9CVdc / 250 mA.
Battery charge level is shown on the display.
Connections:
. Conductivity cell  connection is through a male 8 poles connector DIN45326.
. pH or ORP electrode: female BNC connector
. Serial interface: 8 poles MiniDin connector
. Power supply adapter: two poles connector, (positive is inner terminal)
HD2156 has water tight housing and membrane keyboard, IP67 protection degree, is therefore suitable for in field measurements.
Measuring ranges:   pH:-2.00-+19.99 pH;  mV: -1999.9-+1999.9 mV; 
Conductivity: 0-199.9 uS; 200-1999 uS; 2.00-19.99 mS; 20.0-199.9 mS;
Resistivity: 4.0-199.9 Ohm; 200-999 Ohm; 1.00-19.99 kOhm; 20.0-99.9 kOhm; 100-999kOhm;
Total Dissolved Solids (TDS) (ratio c/TDS = 0.5):0-199.9 mg/l; 200-1999 mg/l; 2.00-19.99 g/l;  20.0-199.9 g/l.